Tubing head



dff

Aug. 20, 1935. A. LEMAN TUBING HEAD Filed June 24, 1953 Patented Aug.20, 1935 PATENT orrlca 'runmc HEAD Arthur L. Leman, Toledo, Ohio,assignor to The National-Superior Company, Toledo, Ohio, a corporationof Delaware Application June 24, 1933, Serial No. 637,481 4 Claims. (01.285-22) The principal object which'I have in view is the simplificationof the structure of tubin heads and the reduction of the number of partsemployed therein.

Another object is the provision of means whereby the parts may bereadily and quickly assembled and disassembled.

In the case of my improved tubing head, the inner member, which usuallysupports a string of tubing is secured within an outer member which maysupport an outer string of tubing, by means of what may be termed abayonet joint between the members, the inner member being first insertedinto the outer member and then partially rotated.

Means are provided for preventing accidental relative rotation betweenthe members which would result in disassemblage.

I provide new and improved meansfor packing the joint between themembers.

Other noyel features of construction, and also arrangemefit of parts,will appear from the following description. 7

In the accompanying drawing, wherein I have illustrated a practicalembodiment of the principles of my invention, Fig. 1 is a view partly inside elevation and partly in vertical section.

Fig. 2 is a sectional view taken along the line 2-2 in Fig. 1.

Fig. 3 is a broken sectional view taken along the line 3-3 in Fig. 1.

Fig. 4 is a broken perspective showing the inner member of my improvedtubing head.

Fig. 5 is a broken view partially in perspective and partially invertical section, showing the outer member.

Referring to the drawing, I represents the outer member of my improvedtubing head which may be tubular and provided with the usual lateralvents 2, and 3 represents the inner member, also usually tubular, andwhich is of proper diameter to fit the upper bore of the member I.

The bore of the member 3 is shown internally threaded at its lower endas at 4, and the upper end of the string of tubing 5 is shown screwedtherein. Likewise, the lower bore of the inner member I may be threaded,as at 6, so that the upper end of an outer string of tubing may bescrewed therein.

The perimetral surface of the lower end of the member 3 is provided witha plurality of arcuate ribs I disposed in a horizontal plane and spacedapart at their adjacent ends, which is more clearly shown in Fig. 4. 8represents an annular shoulder formed in the bore of the member I,

- ends of the ribs 9 are sufficient to permit the ribs shoulder 3.

upon which shoulder the ribs 1 of the member 3 rest when the parts areassembled, thus limiting the downward insertion of the member 3 in themember I and also supporting the tubing 5 from above. 5

Above the shoulder 8 the bore of the member I is provided with aplurality of arcuate ribs 9 disposed in the same horizontal plane andhaving their ends spaced apart. The ribs I and 9 are the same in numberand the gaps between the 10 I to pass down through the same. The spacebetween the shoulder 3 and the ribs 9 is sufficient to receive the ribsI of the member 3. Above the ribs 1 the member 3 is provided with anannular shoulder Ia, the space between said ribs and said shoulder beingsufficient tov receive the ribs 9 of the member I.

When the members are to be assembled, the member 3 is turned so that itsribs I register with the gaps between the ribs 9 of the member I, andthe member 3 is then inserted downwardly into the member I until theribs I rest upon the The member 3 is then partially rotated until itsribs 1 engage under the ribs 9 of the member I. The parts are thuslocked 25 together by what might be called a bayonet joint.

Above the rib Ia, the external diameter of the member 3 is reduced toform an annular seat between the members, into which seat is insertedthe compressible packing I 0 upon which bears the lower edge of theannular metal gland II which is held in place by the member I. I2represents compression screws screwed through threaded holes in a radialflange I3 of the memher 3 and impinging on the gland I I, to compressthe packing I0 and seal the joint between the members I and 3. It isthus apparent that the packing I0 is supported from below by the annularshoulder la of the member 3.

To prevent accidental relative rotation between 40 the members I and 3which might result in disengaging the bayonet joint, I provide themember 3 with a pivoted dog I 4 which is arranged to drop into andengage a properly placed seat I5 on the top of the member I. v

The member 3 is provided adjacent its upper end with oppositely disposedelevator lugs I6 which may be engaged by hoisting means for raising andlowering the member 3. Above the F elevator lugs I6, the member 3 isprovided with the threaded section H, which is arranged to secure acoupling thereto, for providing an external passage to the inner string5.

It is evident from the foregoing that my im- 5 proved tubing head is anexceedingly simple and if inexpensive construction. Its parts are fewand rugged and thus unlikely to become'worn or impaired. The jointbetween the two members which form my tubing head is efliciently packedagainst the escape of fluid or liquid and the packing can be readilytightened up or removed. Furthermore, the members can be quickly andeasily unlocked by relative rotation between them for the raising orremoval of the member; and the tubing'supported therefrom, and asquickly and conveniently can the tubing head be assembled.

I claim i l 1. In a tubing'head having a continuous upper bore, thecombination ofa unitary tubing hanger, means for securing said hangerwithin said bore to prevent longitudinal movement therewith, an annularseat on the tubing hanger above said means, said seat forming a packingchamber with said bore, a packing in said chamber, and means forcompressing said packing.

2. In a tubing head having a continuous upper bore, the combination of aunitary tubing hanger, means for securing said hanger within said boreby partial rotation therein, an annular seat on the tubing hanger abovesaid means,

said seat forming a packing chamber with said bore, a packing in saidchamber, means for compressing said packing, and means for locking saidhanger against accidental rotation.

3. In a tubing head having a continuous upper bore, the combination of aunitary tubing hanger, means for securing said hanger within said boreto prevent longitudinal movement therewith, an annular seat on the,tubing hanger above said.- means, saidseat forming a packing chamberwith said bore, a packing in said chamber, and means carried by saidhanger and accessible independently of said securing means forcompressing said packing.

4, In a tubing head having a continuous upper bore, the combination of aunitary tubing hanger, means for securing said hanger within said boreto prevent longitudinal movement therewith,'an annular seat on thetubing hanger above said means, said seat forming a packing chamber withsaid bore, a packing in said chamber, means carried by said hanger andaccessible independently of said securing means for compressing saidpacking, and elevator lugs integral with said hanger above said packingcompressing means.

ARTHUR L. LEMAN.

